Implementation of V1 buffer runtime functions

packages/host/android/CMakeLists.txt

@@ -20,6 +20,8 @@ add_library(node-api-host SHARED
   ../cpp/Logger.cpp
   ../cpp/CxxNodeApiHostModule.cpp
   ../cpp/WeakNodeApiInjector.cpp
+  ../cpp/RuntimeNodeApi.cpp
+  ../cpp/RuntimeNodeApi.hpp
 )
 
 target_include_directories(node-api-host PRIVATE

packages/host/cpp/RuntimeNodeApi.cpp

@@ -0,0 +1,112 @@
+#include "RuntimeNodeApi.hpp"
+#include <string>
+
+auto ArrayType = napi_uint8_array;
+
+napi_status NAPI_CDECL callstack::nodeapihost::napi_create_buffer(
+    napi_env env, size_t length, void** data, napi_value* result) {
+  napi_value buffer;
+  const auto status = napi_create_arraybuffer(env, length, data, &buffer);
+  if (status != napi_ok) {
+    return status;
+  }
+
+  // Warning: The returned data structure does not fully align with the
+  // characteristics of a Buffer.
+  // @see
+  // https://github.com/callstackincubator/react-native-node-api/issues/171
+  return napi_create_typedarray(env, ArrayType, length, buffer, 0, result);
+}
+
+napi_status NAPI_CDECL callstack::nodeapihost::napi_create_buffer_copy(
+    napi_env env,
+    size_t length,
+    const void* data,
+    void** result_data,
+    napi_value* result) {
+  if (!length || !data || !result) {
+    return napi_invalid_arg;
+  }
+
+  void* buffer = nullptr;
+  if (const auto status = ::napi_create_buffer(env, length, &buffer, result);
+      status != napi_ok) {
+    return status;
+  }
+
+  std::memcpy(buffer, data, length);
+  return napi_ok;
+}
+
+napi_status callstack::nodeapihost::napi_is_buffer(
+    napi_env env, napi_value value, bool* result) {
+  if (!result) {
+    return napi_invalid_arg;
+  }
+
+  if (!value) {
+    *result = false;
+    return napi_ok;
+  }
+
+  napi_valuetype type{};
+  if (const auto status = napi_typeof(env, value, &type); status != napi_ok) {
+    return status;
+  }
+
+  if (type != napi_object && type != napi_external) {
+    *result = false;
+    return napi_ok;
+  }
+
+  auto isArrayBuffer{false};
+  if (const auto status = napi_is_arraybuffer(env, value, &isArrayBuffer);
+      status != napi_ok) {
+    return status;
+  }
+  auto isTypedArray{false};
+  if (const auto status = napi_is_typedarray(env, value, &isTypedArray);
+      status != napi_ok) {
+    return status;
+  }
+
+  *result = isArrayBuffer || isTypedArray;
+  return napi_ok;
+}
+
+napi_status callstack::nodeapihost::napi_get_buffer_info(
+    napi_env env, napi_value value, void** data, size_t* length) {
+  if (!data || !length) {
+    return napi_invalid_arg;
+  }
+  *data = nullptr;
+  *length = 0;
+  if (!value) {
+    return napi_ok;
+  }
+
+  auto isArrayBuffer{false};
+  if (const auto status = napi_is_arraybuffer(env, value, &isArrayBuffer);
+      status == napi_ok && isArrayBuffer) {
+    return napi_get_arraybuffer_info(env, value, data, length);
+  }
+
+  auto isTypedArray{false};
+  if (const auto status = napi_is_typedarray(env, value, &isTypedArray);
+      status == napi_ok && isTypedArray) {
+    return napi_get_typedarray_info(
+        env, value, &ArrayType, length, data, nullptr, nullptr);
+  }
+
+  return napi_ok;
+}
+
+napi_status callstack::nodeapihost::napi_create_external_buffer(napi_env env,
+    size_t length,
+    void* data,
+    node_api_basic_finalize basic_finalize_cb,
+    void* finalize_hint,
+    napi_value* result) {
+  return napi_create_external_arraybuffer(
+      env, data, length, basic_finalize_cb, finalize_hint, result);
+}

packages/host/cpp/RuntimeNodeApi.hpp

@@ -0,0 +1,25 @@
+#include "node_api.h"
+
+namespace callstack::nodeapihost {
+napi_status napi_create_buffer(
+    napi_env env, size_t length, void** data, napi_value* result);
+
+napi_status napi_create_buffer_copy(napi_env env,
+    size_t length,
+    const void* data,
+    void** result_data,
+    napi_value* result);
+
+napi_status napi_is_buffer(napi_env env, napi_value value, bool* result);
+
+napi_status napi_get_buffer_info(
+    napi_env env, napi_value value, void** data, size_t* length);
+
+napi_status napi_create_external_buffer(napi_env env,
+    size_t length,
+    void* data,
+    node_api_basic_finalize basic_finalize_cb,
+    void* finalize_hint,
+    napi_value* result);
+
+}  // namespace callstack::nodeapihost

packages/host/scripts/generate-weak-node-api-injector.ts

@@ -6,6 +6,15 @@ import { FunctionDecl, getNodeApiFunctions } from "./node-api-functions";
 
 export const CPP_SOURCE_PATH = path.join(__dirname, "../cpp");
 
+// TODO: Remove when all runtime Node API functions are implemented
+const IMPLEMENTED_RUNTIME_FUNCTIONS = [
+  "napi_create_buffer",
+  "napi_create_buffer_copy",
+  "napi_is_buffer",
+  "napi_get_buffer_info",
+  "napi_create_external_buffer",
+];
+
 /**
  * Generates source code which injects the Node API functions from the host.
  */
@@ -15,7 +24,8 @@ export function generateSource(functions: FunctionDecl[]) {
     #include <Logger.hpp>
     #include <dlfcn.h>
     #include <weak_node_api.hpp>
-
+    #include <RuntimeNodeApi.hpp>
+
     #if defined(__APPLE__)
     #define WEAK_NODE_API_LIBRARY_NAME "@rpath/weak-node-api.framework/weak-node-api"
     #elif defined(__ANDROID__)
@@ -43,7 +53,10 @@ export function generateSource(functions: FunctionDecl[]) {
     log_debug("Injecting WeakNodeApiHost");
     inject_weak_node_api_host(WeakNodeApiHost {
       ${functions
-        .filter(({ kind }) => kind === "engine")
+        .filter(
+          ({ kind, name }) =>
+            kind === "engine" || IMPLEMENTED_RUNTIME_FUNCTIONS.includes(name)
+        )
         .flatMap(({ name }) => `.${name} = ${name},`)
         .join("\n")}
       });

packages/node-addon-examples/index.js

@@ -14,5 +14,8 @@ module.exports = {
   "5-async-work": {
     // TODO: This crashes (SIGABRT)
     // "async_work_thread_safe_function": () => require("./examples/5-async-work/async_work_thread_safe_function/napi/index.js"),
-  }
+  },
+  "tests": {
+    "buffers": () => require("./tests/buffers/addon.js"),
+  },
 };

packages/node-addon-examples/package.json

@@ -10,7 +10,7 @@
   },
   "scripts": {
     "copy-examples": "tsx scripts/copy-examples.mts",
-    "gyp-to-cmake": "gyp-to-cmake ./examples",
+    "gyp-to-cmake": "gyp-to-cmake .",
     "build": "tsx scripts/build-examples.mts",
     "copy-and-build": "npm run copy-examples && npm run gyp-to-cmake && npm run build",
     "verify": "tsx scripts/verify-prebuilds.mts",

packages/node-addon-examples/scripts/cmake-projects.mts

@@ -2,19 +2,25 @@ import { readdirSync, statSync } from "node:fs";
 import path from "node:path";
 
 export const EXAMPLES_DIR = path.resolve(import.meta.dirname, "../examples");
+export const TESTS_DIR = path.resolve(import.meta.dirname, "../tests");
+export const DIRS = [EXAMPLES_DIR, TESTS_DIR];
 
-export function findCMakeProjects(dir = EXAMPLES_DIR): string[] {
+export function findCMakeProjectsRecursively(dir): string[] {
   let results: string[] = [];
   const files = readdirSync(dir);
 
   for (const file of files) {
     const fullPath = path.join(dir, file);
     if (statSync(fullPath).isDirectory()) {
-      results = results.concat(findCMakeProjects(fullPath));
+      results = results.concat(findCMakeProjectsRecursively(fullPath));
     } else if (file === "CMakeLists.txt") {
       results.push(dir);
     }
   }
 
   return results;
 }
+
+export function findCMakeProjects(): string[] {
+  return DIRS.flatMap(findCMakeProjectsRecursively);
+}

packages/node-addon-examples/tests/.gitignore

@@ -0,0 +1 @@
+build

packages/node-addon-examples/tests/buffers/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.15)
+project(tests-buffers)
+
+add_compile_definitions(NAPI_VERSION=8)
+
+add_library(addon SHARED addon.c ${CMAKE_JS_SRC})
+set_target_properties(addon PROPERTIES PREFIX "" SUFFIX ".node")
+target_include_directories(addon PRIVATE  ${CMAKE_JS_INC})
+target_link_libraries(addon PRIVATE ${CMAKE_JS_LIB})
+target_compile_features(addon PRIVATE cxx_std_17)
+
+if(MSVC AND CMAKE_JS_NODELIB_DEF AND CMAKE_JS_NODELIB_TARGET)
+  # Generate node.lib
+  execute_process(COMMAND ${CMAKE_AR} /def:${CMAKE_JS_NODELIB_DEF} /out:${CMAKE_JS_NODELIB_TARGET} ${CMAKE_STATIC_LINKER_FLAGS})
+endif()